Finding the Fourth Proportional to 78,722.29, 108,634.59 and 42,913

Step by Step Solution

1. Step 1: Write the proportion equation
   78,722.29 : 108,634.59 = 42,913 : x
2. Step 2: Convert to fraction form
   78,722.29/108,634.59 = 42,913/x
3. Step 3: Cross multiply
   78,722.29x = 108,634.59 × 42,913
4. Step 4: Simplify right side
   78,722.29x = 4,661,836,160.67
5. Step 5: Solve for x
   x = 4,661,836,160.67/78,722.29
6. Step 6: Final answer
   x = 59,218.76